Impact crushing machine



A118'- 4, 1959 H. J. ROGERS 2,898,053

IMPACT CRUSHING MACHINE Filed Jan. 3, 1958 2 Sheens-Sheel 2 K "7 eATTORNEY dice IMPACT CRUSHING MACHINE Harry J. Rogers, Pleasanton, Tex.Application January 3, 1958, Serial No. 706,948 y 4 Claims. (Cl.241--275) great `force for fractnring and crushing the aggregate solelyby` impact force rather than by grinding or attrition. t l

A further object of the invention is to provide a crusher having anannular space between the corrugated shell surface and the rotor whichVis surrounded thereby and which diminishes in radial width toward thebottom outlet end of the crusher whereby as the rocks and stones arehurled back and vforth between the rotor and corrugated shell surface intheir spiral travel downwardly through the annular space, the width -ofsaid space will diminish as the rocks and stones are broken up andreduced in size.

A further object of the invention is to provide a crushing machinehaving an inlet at the top` thereof and an outlet at the bottom of themachine so thatthe material to be crushed will be fed by gravity tothemachine through the top thereof and the crushed and nely dividedmaterial will be discharged Vby gravity from a lower part of themachine. 'l

Another object of the invention is to' provide a machine wherein therotor additionally functions as a blower for cooling the surfaces of themachine which are subjected to heat by frictional contact with thematerials being crushed and for additionally blowing iinely crushedparticles from the machine through the outlet thereof to prevent suchparticles accumulating on the corrugated inner face of the shell.

yStill another object of the invention is to provide a machine ofextremely simple construction which may be very economicallymanufactured and sold, which can be eciently operated with a powersource of low horsepower and wherein the parts subject to wear arereadily replaceable.

Another object of the invention is to provide a machine having a minimumof bearings and wherein the bearings are sealed oil from abrasivesubstances produced by the crushing action of the machine.

Various other objects and advantages of the invention will hereinafterbecome more fully apparent from the following description of thedrawings, illustrating a presently preferred embodiment thereof, andwherein:

Figure 1 is a front elevational view of a preferred embodiment of thecrushing machine;

Figure 2 is an enlarged vertical sectional view thereof, takensubstantially along a plane as indicated by the line 2 2 of Figure l;

Figure 3 is a horizontal sectional view through the upper portion of themachine, taken substantially along a plane as indicated by the line 3 3of Figure 2;

Anited States Patent Figure 4 is a fragmentary horizontal sectional viewtaken through the lower portion of the machine, substantially along theline 4-4 of Figure 2;

Figure 5 is a fragmentary radial sectional View, taken substantiallyalong a plane as indicated by the line 5-5 of Figure 3, and

Figure 6 is a detailed horizontal sectional view through a portion ofthe rotor, taken substantially along a plane as indicated by the line6-46 of Figure 2.

Referring more specifically to the drawings, the impact crushing machinein its entirety is designated generally 8 and includes a base 9 which isadapted to rest upon any suitable horizontal supporting surface 41i).Upright posts 11 are fixed to and rise from the base 9.

A4 shell or housing, designated generally 12, includes a bottom section13 having an open top and a substantially cylindrical upper portionincluding a side wall 14. Said bottom shell section 13 has asubstantially semicircular horizontal bottom portion 15, as best seen inFigure 2, which is disposed beneath and adjacent the open top of thebottom shell section 13. The other half of the bottom of the section 13is closed by an inclined bottom portion 16 which forms a chute, therounded bottom edge of which terminates above but adjacent the level ofthe underside of the base 9. The semicylindrical portion of the sidewall y14 which surrounds the chute portion 16 is extended downwardlyrelative to the side wall portion 14 which surrounds the flat bottomsegment 15, so that said first mentioned side wall portion has itsbottom edge secured to the marginal edge of the chute 16. Said firstmentioned side wall portion 14 is provided with a discharge opening 17located at the lower end of the inclined bottom surface or chute 16 andwhich constitutes the only opening at the bottom of the shell 12. Theupwardly extending posts 11 are secured to the cylindrical wall 14 forrigidly supporting the bottom shell section 13 above the 4base 9. Theshell 12 also includes acylindrical upper shell section 18 which is openat both ends and which is of the same diameter as the upper portion ofthe lower shell section 13, and the open lower end of which rests uponand is supported by the upper edge of the wall 1 4.

A flanged cover 19 is detachably mounted on the open upper end of theupper shell section 18. As best seen in Figure l, the upper portion ofthe wall 14 and the lower portion of the upper shell section 13 are eachprovided with circumferentially spaced outwardly projecting aperturedlugs 20. The lugs 20 of the shell section 18 rest upon the lugs 20 ofthe lower shell section 1,3 and said lugs are detachably connectedtogether by nut and bolt fastenings 21 for detachably assembling theshell sections 13 and 18 together. The Harige 22 of the cover 19 hassimilar outwardly projecting apertured lugs 20 at its bottom edge whichrest upon outwardly projecting lugs 20 of the upper shell section 18,and which last mentioned lugs are similarly connected together by ad-`ditional nut and bolt f astenings 21 for detachably securing the cover19 on the open upper end of the shell 12. The cover 19 is provided witha centrally disposed flanged inlet opening 23 constituting the inlet ofthe machine 8.

A tubular column 24 has an intermediate portion extending through andsecured in an opening 25 which is formed partially in the bottom 15 andpartially in the chute 16, so that the column 24 is supported rigidly inan upright position by the bottom shell section 13 and substantiallycentrally of the shell 12. The tubular column 24 is provided withantfricton bearings 26 and 27 near the ends thereof, the outer races ofwhich are secured to thecolurnn 24 and-taper inwardly with respectthereto. A shaft 28 extends longitudinally through the column 24 and isjournaled in the bearings 26 and 27. The shaft 28 has a threaded portion29 near its lower end which is engaged by a nut 30. The -nut 30 bearsagainst and supports the inner race of the lower bearing 27 which isloosely mounted on the shaft 28 andrdisposed at the lower end of thecolumn 24. The inner race of the upper bearing 26 is xed to the shaft28, as byA welding, as seen at 36, for supporting the shaft in thecolumn 24. The shaft 28 has a restricted portion 31 which extendsdownwardly from its threaded portion 29 and to which a multiple groovedbelt pulley 32 is secured. The belt pulley 32 is disposed between spacedsill portions of the base 9 and hasv endless belts 33 trainedtherearound and which are driven from a suitable power source, notshown, for imparting rotation to the belt pulley 32 and shaft 28. Alubricant fitting 34 extends through the wall of the hollow column 24above and adjacent the lower bearing 27 and a lubricant supply conduit35 has a discharge end opening radially through the tubular column 24above and adjacent the upper bearing 26, which is spaced from the upperend of the column 24, for lubricating the bearings 26 and 27.

A rotor, designated generally 37, includes a substantially dat disc 38having a depending centrally disposed internally threaded socket 39which extends into the upper end of the column 24 and is detachablysecured to the threaded upper end 40 of the shaft 28. The socket 39 maybe secured by additional welding 36 to the disc 38. The upper side ofthe disc 38 has a plurality preferably four vanes 41 fixed thereto anddisposed with their planes perpendicular to the plane of the disc. Eachvane 41 extends from adjacent the center of the disc 38 to approximatelyits periphery and each vane is disposed substantially parallel toanother vane and at substantially a right angle to the two remainingvanes, as seen in Figure 3. The inner ends of the vanes 41 have theirupper edges recessed as seen at 42 to provide a concave curvature. Theinlet opening 23 opens into the recessed inner ends of the vanes 41, asseen in Figure 2. An armor member 43 of thick, hard, wear resistantmetal is detachably secured to the forward or leading side of each vane41 by screw fastenings 44, as best seen in Figure 3. The armor members43 have inner ends 45 the upper edges of which are recessed -to conformto the recessed inner ends 42 of the vanes and said inner ends 45 arealso beveled on their outer sides toward their inner terminals, as seenin Figure 3. The outer ends of the armor members 43 project beyond theouter ends of the vanes 41 and are thickened on their trailing sides asseen at 46 to engage across the outer ends of the vanes 41. The rotor 37also includes a plurality, preferably four rigid platelike arms 47having upper ends secured to the underside of the disc 38 and whichextend downwardly therefrom to adjacent the level of the bottom edge ofthe upper shell section 18. The planes of said arms 47 are disposedradially of the rotor 37 and the upper ends thereof are secured to thedisc 38 so that the outer edge of the upper end of each arm is disposedsubstantially flush with a portion of the periphery of the disc 38. Thearms 47 are inclined downwardly and outwardly relative to the disc 38,as seen in Figure 2. An armor member 48 is secured to the forward orleading side of each arm 47 by screw fastenings 49 for detachablymounting the armor members 48 on the arms 47. As best seen in Figure 6,the armor members 48 are also relatively thick and are formed of a hardwear resistant metal and have thickened outer edge portions 50 whichextend across the outer edges of the arms 47.

The upper shell section 18 is provided 'with a lining 51 of thick metalincluding an upper half 52 of uniform internal and external diameter anda lower half 53 the outer diameter of which is uniform but the innerdiameter of which diminishes toward its bottom edge due to the factthat` the lower liner half`53 increases in thickness toward its bottomedge. The inner face of both liner halves 52 and 53 is corrugated asseen at 54, being composed preferably of substantially V-shaped ribs andgrooves. Each half 52 and 53 of the liner 51 is preferably composed of aplurality of ring segments 55, as best seen in Figures 2 and 3, each ofwhich is secured to the inner side of the shell section 18 Iby aplurality of screw fastenings 56. The shaft 28 can be revolved at a highrate of speed by a power source of approximately ten horsepower to turnthe rotor at a high r.p.rn. in a counterclockwise direction, asindicated by the arrow in Figure 3. Stone, lgravel and other hardmaterials up to six inches in size may be fed by gravity into themachine 8 through the inlet opening 23 and will be engaged by the armormembers 43 of the vanes 41 and will be hurled with great forcecentrifugally against the corrugated inner face of the upper liner half52 and will rebound therefrom into the path of travel of the armoredleading sides of the arms 47 by which the fragments,.not shown, will beagain hurled centrifugally outward against the corrugated inner linerface 54. This back and forth movement of the rock, stone or gravel, notshown, will continue until the particles have passed downwardly from theupper shell section 18 into the lower shell section 13. The travel ofthe fragments will be in a spiral course around the rotor as thefragments are thrown back and forth between the rotor and liner 51, sothat each rock or stone will be broken into a num-ber of smallfragments. As the broken fragments progress toward the bot- Ytom of theupper shell section 18 the gap between the corrugated liner face 54 andthe outer edge portions 50 of the armor members 48 diminishes so thatthere will be a more rapid rebounding of the smaller fragments back andforth between said armor members 48 and the corrugated inner face 54 ofthe lower liner ring 53 to effect a breaking up of the rock, stone orgravel into very small fragments. The size of the fragments dischargedinto the lower shell half 13 will depend upon the rate at which therotor 37 is revolved and to some extent upon the spacing between theouter armored edges 50 and the corrugated inner face 54 of the lowerliner half 53. The portions of the broken fragments discharged into thellower shell half 13 will come to rest upon the llat bottom 15 while theremainder of the fragments will fall onto the chute 16 and be dischargedby gravity therefrom through the outlet 17. The aggregate fragmentslanding on the flat bottom 15 will be propelled therearound and onto thechute 16 by other fragments being thrown onto the bottom 15 from therotor 37 and will thus be further reduced in size before being propelleddown the chute 16 to the outlet 17.

The rotor 37 additionally forms a blower for cooling the machine 8 andfor blowing dust particles therefrom through the outlet 17 and whichwould otherwise accumulate in the corrugations 54.

Various modifications and changes are contemplated and may be resortedto, without departing from the function or scope of the invention ashereinafter defined by the appended claims.

I claim as my invention: v

l. An impact crushing machine for rock, stone, gravel and othermaterials to be crushed, comprising a fixed shell, a rotatably drivenrotor mounted centrally within a portion of said shell and including asubstantially flat disc, said shell having a corrugated inner facedisposed substantially concentrically around and spaced outwardly fromsaid rotor, said shell having a top portion provided with substantiallycentrally disposed inlet opening through which material to be crushed isadapted to be fed by gravity onto said disc, rigid vane members fixed toand rising from said disc and extending inwardly from adjacent theperiphery of the disc, said vane members being rotatable with the disc,beneath said top portion, for hurling the material by centrifugal forcefrom the disc against said corrugated shell face, and arms fixed to andextending downwardly from the underside of the outer portion of saiddisc, said arms being of substantial radial width and having downwardlyand outwardly inclined outer edges disposed in downwardly convergingrelation to the corrugated inner shell face.

2. An impact crushing machine as in claim 1, and armor membersdetachably secured to and covering the leading sides of said vanemembers and arms and having outer edge portions extending across theouter edges of the 'vane members and arms.

3. An impact crushing machine as in claim 1, said corrugated inner shellface including an upper portion of substantially uniform diametersurrounding said disc and vane members and a lower portion of downwardlydiminishing diameter surrounding the lower portions of said arms.

4. An impact crushing machine as in claim 1, said shell having asubstantially at approximately semicircular bottom portion disposedbeneath and spaced from said rotor and said corrugated inner shell face,and another substantially semicircular inclined bottom portion extendingdownwardly from said substantially iiat bottom portion and forming alchute, and said shell including a side wall having an outlet openingdisposed adjacent the lower end of said chute and constituting theoutlet of the machine.

, References Cited in the tile of this patent UNITED STATES PATENTS315,716 Burr et al. Apr. 14, 1885 982,516 Marks Jan. 29,1911 994,596Marks June 6, 1911 1,228,338 Marks May 29, 1917 1,532,742 Hadsel Apr. 7,1925 1,561,031 Simpson Nov. 10, 1925 2,357,843 Morrissey Sept. 12, 19442,580,579 Neenan Jan. 1, 1952 2,682,376 Frank June 29, 1954 2,780,417Harris Feb. 5, 1957 FOREIGN PATENTS 444 Great Britain of 1876 263,660Great Britain Jan. 6, 1927 376,760 Great Britain July 5, 1932

